[mythtv] how mythtv handles udp multicast of mpeg ts stream having multiple streams

radhika g gradhika.dn at gmail.com
Mon Jan 21 06:53:57 UTC 2013

Using the latest git master branch code of mythtv itself. When i am trying
to playback a file with multiple streams, i am unable to view or record
even one stream.

Below are the backend logs:
Loaded [data]udp://[fectype][fec0][fec1] for 1001
2013-01-21 11:19:46.862263 N  AutoExpire: CalcParams(): Max required Free
Space: 3.0 GB w/freq: 14 min
2013-01-21 11:19:46.936648 I  IPTVSH( run()
2013-01-21 11:19:46.936737 I  IPTVSH( Joining
2013-01-21 11:19:47.140899 E  DTVSM(): Program #0 not found in PAT!
Program Association Section
 PSIP tableID(0x0) length(29) extension(0x27dd)
      version(11) current(1) section(0) last_section(0)
      tsid(10205) programCount(5)
  program number     3 has PID 0x0030
  program number     7 has PID 0x0031
  program number     1 has PID 0x0032
  program number     2 has PID 0x0033
  program number     8 has PID 0x0034

2013-01-21 11:19:47.738693 E  ProcessPAT: Program not found in PAT. Rescan
your transports.
2013-01-21 11:19:47.738735 E  Desired program #0 not found in PAT.
Cannot create single program PAT.
2013-01-21 11:23:46.239964 I  Running housekeeping thread
2013-01-21 11:28:47.248283 I  Running housekeeping thread

>Having said that, I had never heard of an iptv channels streaming a TS
>with multipliple video stream

I have seen some UK based solutions having multiple video streams.

On Sat, Jan 19, 2013 at 6:18 AM, Jean-Yves Avenard <jyavenard at gmail.com>wrote:

> On 18 January 2013 23:27, radhika g <gradhika.dn at gmail.com> wrote:
> > #EXTM3U
> > #EXTINF:0,1 - testudp
> > udp://@
> [...]
> > I think based on the pid, we should be able split  and record the
> streams.
> > But since we are giving "channel1" in m3u file, how are we going to
> display
> > multiple streams. Any suggestions on how to handle the incoming stream.
> What you put in the m3u other that the URL, serves no purpose
> whatsoever other than being used as the channel name during the first
> scan.
> So you're not setting put which channel you need to use.
> myth doesn't allow to switch video stream in a mpeg-ts file, it takes
> the first one which may not be usable.
> Try upgrading to master instead, there's a new method for determining
> which video stream is best... You'll still be able to only watch one
> and can't switch to the others.
> Having said that, I had never heard of an iptv channels streaming a TS
> with multipliple video stream
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